diff --git a/programs/src/shell/tabcompletion.cpp b/programs/src/shell/tabcompletion.cpp
index 0515c61..9661750 100644
--- a/programs/src/shell/tabcompletion.cpp
+++ b/programs/src/shell/tabcompletion.cpp
@@ -16,6 +16,10 @@
 bool is_executable(const char* path) {
 	size_t len = montauk::slen(path);
 
+	if (len < 4) {
+		return false;
+	}
+
 	if (path[len - 1] == 'f' &&
 		path[len - 2] == 'l' &&
 		path[len - 3] == 'e' &&